Javier Aquino (No. 11) of Mexico fights for the ball with DaMarcus Beasley of the U.S. during their team's match Tuesday in Mexico City. The game ended in a 0-0 tie. Miguel Tovar/Getty Images hide caption

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Math and sports are expressions of our controlled creativity. Above, Brazil goalkeeper Julio Cesar watches as the ball sails past for an England goal by Frank Lampard during a friendly at London's Wembley Stadium on February 6, 2013. Adrian Dennis/AFP/Getty Images hide caption

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Sweden's striker and team captain Zlatan Ibrahimovic during Wednesday's "friendly" against England in Stockholm. Jonathan Nackstrand /AFP/Getty Images hide caption

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Lionel Messi (second from left) and some of his Barcelona teammates during a match last weekend. Javier Soriano/AFP/Getty Images hide caption

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Lionel Messi of Barcelona during a match Saturday against RCD Espanyol. David Ramos/Getty Images hide caption

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Fabrice Muamba, center, with cardiologist Dr. Andrew Deaner (left) and cardiologist Dr. Sam Mohiddin (right), before his release from the London Chest Hospital today. David Brookes /AFP/Getty Images hide caption

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Fabrice Muamba of the Bolton Wanderers during last Saturday's game against Tottenham Hotspur in London, before his collapse. Richard Heathcote/Getty Images hide caption

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Brazilian Sports Minister Aldo Rebelo says his country no longer recognizes FIFA secretary general Jerome Valcke as a spokesman after Valcke slammed Brazil's World Cup preparations. AFP/AFP/Getty Images hide caption

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Flares were thrown in the stadium during clashes that erupted after a football match between Egypt's Al-Ahly and Al-Masry teams in Port Said. AFP/Getty Images hide caption

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John Terry, right, and opponent Anton Ferdinand during the English Premier League on Oct. 23 in which it's alleged that Terry hurled a racial slur at Ferdinand. Terry denies doing that. He's going to face criminal charges. Nick Potts/AP hide caption

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